1 files changed, 10 insertions, 0 deletions
diff --git a/library/core/tests/option.rs b/library/core/tests/option.rs
index ae814efec20..5388b475624 100644
--- a/library/core/tests/option.rs
+++ b/library/core/tests/option.rs
@@ -402,3 +402,13 @@ fn test_unwrap_drop() {
 
     assert_eq!(x.get(), 0);
 }
+
+#[test]
+pub fn option_ext() {
+    let thing = "{{ f }}";
+    let f = thing.find("{{");
+
+    if f.is_none() {
+        println!("None!");
+    }
+}